FFmpeg prebuilt binaries for NW.js / Chromium
GPL-2.0 License
FFmpeg prebuilt binaries with proprietary codecs and build instructions for Window, Linux and macOS.
Downloads can be found here
node build[-h] [-c] [--version NW_VERSION] [--arch TARGET_ARCH] or npx nwjs-ffmpeg-prebuilt [-h] [-c] [-d] [--get-download-url] [--version NW_VERSION] [--arch TARGET_ARCH]
You can get the FFmpeg source code from here.
License and Patent Fee
Using MP3 and H.264 codecs requires you to pay attention to the patent royalties and the license of the source code. Consult a lawyer if you do not understand the licensing constraints and using patented media formats in your application. For more information about the license of the source code, check here.